PURPOSE: To provide a titled cathode which consists of a 3-component alloy having a specific composition and has extremely small deterioration in characteristics, by electrodepositing electrode active metallic particles consisting of 3 elements; Ni, etc., Al, etc. and Ti, etc. together on an electrode core body, then treating the same with an aq. caustic soda soln.
CONSTITUTION: Electrode active metallic particles consisting of a 3-component alloy composed of a component X which is Ni and/or CO, a component Y which is Al, Zn or Mg, and a component Z which is ≥1 kinds among preferably, Ti, Sn, Zr of IV group metals of periodic table are electrodeposited together on an electrode core by using a planting bath contg. the metallic ions of the same kind as the above-mentioned component X or are melt-coated or calcined thereon. The electrode active metallic particles on the electrode core are then treated for 0.5W3hr in an aq. caustic soda soln. kept at 10W35% concn. of NaOH and 10W 50°C, and the low overvoltage cathode having high durability exposed on the surface with the electrode active metallic particles consisting of the alloy wherein the components X, Y, Z are in the range enclosed of the points A(99, 0,1), B(79, 20, 1), C(50, 20, 30), D(42, 16, 42), E(50, 0, 50) shown in the figure is obtd.
OTOMA TAKASHI
ENDOU EIJI
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